Istanbul's Bourse Takes Investors
On Jarring Ride in Recent Weeks

ISTANBUL, Turkey -- The Istanbul Stock Exchange, in line with volatile Turkish politics, is taking a roller-coaster ride.

The IMKB-100 Index slid 68.71 points, or 1.7%, to 4020.86 on Monday, after hitting a peak of 4366 last week. Earlier this month, the index rose 20% in a 10-day span while trading volume climbed to a daily peak of $800 million as foreign investors returned to Turkish assets. On Monday, volume totaled $318.8 million,...